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B737-700 flight crew execute TCASII RA maneuver on approach to lax runway 7R due to an overtaking commuter on approach to runway 7L. Told not to pass traffic on approach for runway 7R.
| Attributes | |
| ACN | 573546 |
| Time | |
| Date | 200302 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : lax.airport |
| State Reference | CA |
| Altitude | msl single value : 2000 |
| Environment | |
| Flight Conditions | IMC |
| Aircraft 1 | |
| Controlling Facilities | tower : lax.tower tower : hrl.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 7r |
| Flight Phase | descent : approach |
| Route In Use | approach : instrument precision |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tower : lax.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 7l |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| ASRS Report | 573546 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne critical non adherence : clearance |
| Independent Detector | aircraft equipment : tcas other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Supplementary | |
| Problem Areas | Airport Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On approach in IMC (marginal VMC) a commuter air carrier was cleared to follow us for an approach to runway 7L. We were on ILS runway 7R. ATC advised the commuter to remain visual and not to pass us on the approach. At 2000 ft, the commuter passed us, causing a TCASII alert and a 'climb' command. As soon as we initiated the climb, a 'clear of conflict' was announced. We descended to the GS when the commuter again caused the TCASII to alert -- this time with a 'descend' command. We complied, descending 1 DOT below GS. Landed without further incident. Tower notified of TCASII alert.
Original NASA ASRS Text
Title: B737-700 FLT CREW EXECUTE TCASII RA MANEUVER ON APCH TO LAX RWY 7R DUE TO AN OVERTAKING COMMUTER ON APCH TO RWY 7L. TOLD NOT TO PASS TFC ON APCH FOR RWY 7R.
Narrative: ON APCH IN IMC (MARGINAL VMC) A COMMUTER ACR WAS CLRED TO FOLLOW US FOR AN APCH TO RWY 7L. WE WERE ON ILS RWY 7R. ATC ADVISED THE COMMUTER TO REMAIN VISUAL AND NOT TO PASS US ON THE APCH. AT 2000 FT, THE COMMUTER PASSED US, CAUSING A TCASII ALERT AND A 'CLB' COMMAND. AS SOON AS WE INITIATED THE CLB, A 'CLR OF CONFLICT' WAS ANNOUNCED. WE DSNDED TO THE GS WHEN THE COMMUTER AGAIN CAUSED THE TCASII TO ALERT -- THIS TIME WITH A 'DSND' COMMAND. WE COMPLIED, DSNDING 1 DOT BELOW GS. LANDED WITHOUT FURTHER INCIDENT. TWR NOTIFIED OF TCASII ALERT.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.